25 active days
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Tracked flight number
AS421
Analysis window
Aug 20 – Sep 24, 2026
Every derived statistic, daily trend, route, tail number assignment, flight observation, and mapped path below uses this flight-date window.
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1,897 mi avg per flight
3 hr 49 min average
Average across flights included in analytics
4 aircraft types
Tracked activity
Aug 20 – Sep 24, 2026 · 25 active days
Flights25
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Observed route footprint
Routes tracked as AS421
Directional airport pairings in Aug 20 – Sep 24, 2026.
| Route | Flights | Active days | Tail numbers | Tracked distance | Observed | First observed | Last observed |
|---|---|---|---|---|---|---|---|
| 25 | 25 | 0 | 47,434 mi | 95 hr 24 min | Aug 20, 2026, 5:34 PM UTC | Sep 21, 2026, 10:47 PM UTC |
Observed tail number assignments
Tail numbers tracked as AS421
Open a tail number for its complete tracked profile.
| Tail number | Type | Flights | Routes | Tracked distance | First observed | Last observed |
|---|---|---|---|---|---|---|
| B739 | 2 | 1 | 3,750 mi | Sep 3, 2026, 5:55 PM UTC | Sep 7, 2026, 9:22 PM UTC | |
| B739 | 1 | 1 | 1,909 mi | Sep 21, 2026, 6:56 PM UTC | Sep 21, 2026, 10:47 PM UTC | |
| B39M | 1 | 1 | 1,911 mi | Sep 20, 2026, 6:15 PM UTC | Sep 20, 2026, 9:59 PM UTC | |
| B39M | 1 | 1 | 1,892 mi | Sep 19, 2026, 7:12 PM UTC | Sep 19, 2026, 10:44 PM UTC | |
| B39M | 1 | 1 | 1,891 mi | Sep 18, 2026, 6:32 PM UTC | Sep 18, 2026, 10:07 PM UTC | |
Observed aircraft types
Aircraft types tracked as AS421
Observed flights grouped by aircraft designator and matched to the aircraft reference catalog.
| Type | Aircraft name | Flights | Makeup | Tail numbers | Tracked distance | Routes | First observed | Last observed |
|---|---|---|---|---|---|---|---|---|
| B739 | Boeing 737-900 | 8 | 32.0% | 7 | 15,242 mi | 1 | Aug 20, 2026, 5:34 PM UTC | Sep 21, 2026, 10:47 PM UTC |
| B39M | Boeing 737 MAX 9 | 8 | 32.0% | 8 | 15,125 mi | 1 | Aug 22, 2026, 5:33 PM UTC | Sep 20, 2026, 9:59 PM UTC |
| B738 | Boeing 737-800 | 6 | 24.0% | 6 | 11,407 mi | 1 | Aug 24, 2026, 6:32 PM UTC | Sep 6, 2026, 9:30 PM UTC |
| B38M | Boeing 737 MAX 8 | 3 | 12.0% | 3 | 5,660 mi | 1 | Aug 23, 2026, 8:00 PM UTC | Sep 14, 2026, 10:10 PM UTC |
Observation log
Flight observations
Latest 100 flights for AS421 within Aug 20 – Sep 24, 2026
| Confidence | Route | Tail number | Aircraft | First observed | Last observed | Observed | Tracked distance |
|---|---|---|---|---|---|---|---|
| High · 100 | B739 | Sep 21, 2026, 6:56 PM UTC | Sep 21, 2026, 10:47 PM UTC | 3 hr 50 min | 1,909 mi | ||
| High · 100 | B39M | Sep 20, 2026, 6:15 PM UTC | Sep 20, 2026, 9:59 PM UTC | 3 hr 44 min | 1,911 mi | ||
| High · 100 |